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Note 5 - Credit Quality - Loans Modified as Troubled Debt Restructurings (Details) $ in Thousands		3 Months Ended	6 Months Ended
		Jun. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
TDRs				$ 8,436
Loans modified	[1]	$ 245	$ 276
Total contracts		2	3
Pre-modification recorded investment		$ 238	$ 269
Financial Asset, Not Past Due [Member]
Loans modified		642
Financial Asset, 30 to 89 Days Past Due [Member]
Loans modified		0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans modified		0
Payment Deferral [Member]
TDRs		404	404
Loans modified			$ 0
Total contracts			0
Pre-modification recorded investment			$ 0
Payment Deferral [Member] | Non-farm, Non-residential [Member]
Loans modified			$ 0
Total contracts			0
Pre-modification recorded investment			$ 0
Below Market Interest Rate [Member]
Loans modified		$ 245	$ 31
Total contracts		2	1
Pre-modification recorded investment		$ 238	$ 31
Below Market Interest Rate [Member] | Single Family Owner Occupied [Member]
Loans modified	[1]	$ 245	$ 31
Total contracts		2	1
Pre-modification recorded investment		$ 238	$ 31
Below Market Interest Rate and Extended Payment Term [Member]
Loans modified	[1]		$ 245
Total contracts			2
Pre-modification recorded investment			$ 238
Below Market Interest Rate and Extended Payment Term [Member] | Single Family Owner Occupied [Member]
Loans modified	[1]		$ 0
Total contracts			0
Pre-modification recorded investment			$ 0
Below Market Interest Rate and Extended Payment Term [Member] | Single Family Non-owner Occupied [Member]
Loans modified	[1]		$ 245
Total contracts			2
Pre-modification recorded investment			$ 238
Extended Maturity [Member]
TDRs		8	8
Principal Forgiveness [Member]
TDRs		8	8
Single Family Owner Occupied [Member] | Financial Asset, Not Past Due [Member]
Loans modified		634
Single Family Owner Occupied [Member] | Financial Asset, 30 to 89 Days Past Due [Member]
Loans modified		0
Single Family Owner Occupied [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans modified		0
Single Family Owner Occupied [Member] | Payment Deferral [Member]
TDRs		404	$ 404
Percentage of total financing receivable			0.056%
Single family owner occupied			$ 6
Consumer Loans [Member] | Financial Asset, Not Past Due [Member]
Loans modified		8
Consumer Loans [Member] | Financial Asset, 30 to 89 Days Past Due [Member]
Loans modified		0
Consumer Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans modified		0
Consumer Loans [Member] | Extended Maturity [Member]
TDRs		8	$ 8
Percentage of total financing receivable			0.006%
Consumer Loans [Member] | Extended Maturity [Member] | Minimum [Member]
Extended term (Month)			60 months
Consumer Loans [Member] | Extended Maturity [Member] | Maximum [Member]
Extended term (Month)			84 months
Consumer Loans [Member] | Principal Forgiveness [Member]
TDRs		$ 8	$ 8
Percentage of total financing receivable			0.001%
Single family owner occupied			$ 13
[1] Represents the loan balance immediately following modification

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